+publisher:"Texas A&M University" +contributor:("Anand, N K.")

Texas A&M University

1. Kim, Ick Chan. Experimental investigation of size effect on thermal conductivity for ultra-thin amorphous poly(methyl methacrylate) (PMMA) films.

Degree: 2009, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-1348

► An investigation was conducted to determine whether a ?size effect? phenomenon for one particular thermophysical property, thermal conductivity, actually exists for amorphous poly(methyl methacrylate) (PMMA)… (more)

Subjects/Keywords: Thermal conductiviy; Thickness; PMMA; Thin film

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APA (6^th Edition):

Kim, I. C. (2009). Experimental investigation of size effect on thermal conductivity for ultra-thin amorphous poly(methyl methacrylate) (PMMA) films. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-1348

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kim, Ick Chan. “Experimental investigation of size effect on thermal conductivity for ultra-thin amorphous poly(methyl methacrylate) (PMMA) films.” 2009. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-1348.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kim, Ick Chan. “Experimental investigation of size effect on thermal conductivity for ultra-thin amorphous poly(methyl methacrylate) (PMMA) films.” 2009. Web. 14 Dec 2019.

Vancouver:

Kim IC. Experimental investigation of size effect on thermal conductivity for ultra-thin amorphous poly(methyl methacrylate) (PMMA) films. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1348.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kim IC. Experimental investigation of size effect on thermal conductivity for ultra-thin amorphous poly(methyl methacrylate) (PMMA) films. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1348

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

2. Mlcak, Justin Dale. Simulation of Three-Dimensional Laminar Flow and Heat Transfer in an Array of Parallel Microchannels.

Degree: 2009, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-1671

► Heat transfer and fluid flow are studied numerically for a repeating microchannel array with water as the circulating fluid. Generalized transport equations are discretized and… (more)

▼ Heat transfer and fluid flow are studied numerically for a repeating microchannel array with water as the circulating fluid. Generalized transport equations are discretized and solved in three dimensions for velocities, pressure, and temperature. The SIMPLE algorithm is used to link pressure and velocity fields, and a thermally repeated boundary condition is applied along the repeating direction to model the repeating nature of the geometry. The computational domain includes solid silicon and fluid regions. The fluid region consists of a microchannel with a hydraulic diameter of 85.58?m. Independent parameters that were varied in this study are channel aspect ratio and Reynolds number. The aspect ratios range from 0.10 to 1.0 and Reynolds number ranges from 50 to 400. A constant heat flux of 90 W/cm2 is applied to the northern face of the computational domain, which simulates thermal energy generation from an integrated circuit. A simplified model is validated against analytical fully developed flow results and a grid independence study is performed for the complete model. The numerical results for apparent friction coefficient and convective thermal resistance at the channel inlet and exit for the 0.317 aspect ratio are compared with the experimental data. The numerical results closely match the experimental data. This close matching lends credibility to this method for predicting flows and temperatures of water and the silicon substrate in microchannels. Apparent friction coefficients linearly increase with Reynolds number, which is explained by increased entry length for higher Reynolds number flows. The mean temperature of water in the microchannels also linearly increases with channel length after a short thermal entry region. Inlet and outlet thermal resistance values monotonically decrease with increasing Reynolds number and increase with increasing aspect ratio. Thermal and friction coefficient results for large aspect ratios (1 and 0.75) do not differ significantly, but results for small aspect ratios (0.1 and 0.25) notably differ from results of other aspect ratios. Advisors/Committee Members: Anand, N. K. (advisor), Han, Je C. (committee member), Hassan, Yassin A. (committee member), Rightley, Michael J. (committee member).

Subjects/Keywords: Microchannel; SIMPLE; Aspect Ratio; Channel Flow; Forced Convection

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APA (6^th Edition):

Mlcak, J. D. (2009). Simulation of Three-Dimensional Laminar Flow and Heat Transfer in an Array of Parallel Microchannels. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-1671

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mlcak, Justin Dale. “Simulation of Three-Dimensional Laminar Flow and Heat Transfer in an Array of Parallel Microchannels.” 2009. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-1671.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mlcak, Justin Dale. “Simulation of Three-Dimensional Laminar Flow and Heat Transfer in an Array of Parallel Microchannels.” 2009. Web. 14 Dec 2019.

Vancouver:

Mlcak JD. Simulation of Three-Dimensional Laminar Flow and Heat Transfer in an Array of Parallel Microchannels. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1671.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mlcak JD. Simulation of Three-Dimensional Laminar Flow and Heat Transfer in an Array of Parallel Microchannels. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1671

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

3. Ravindran, Parag. A study of sand-asphalt mixtures: a constitutive model based on a thermomechanical framework and experimental corroboration.

Degree: 2009, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-1822

► Asphalt bound mixtures have been put to diverse uses. The complicated nature of the material and the demanding conditions under which it is used preclude… (more)

▼ Asphalt bound mixtures have been put to diverse uses. The complicated nature of the material and the demanding conditions under which it is used preclude complete solutions to questions on load bearing capability under field conditions. In proportion to the quantity of its usage and in acknowledgment of modeling complexity, the material has been interrogated by many researchers using a variety of mechanical tests, and a plethora of linear viscoelastic models have been developed. Most models are intended to account for specific classes of problems. This work addresses the conspicuous absence of systematic documentation of normal forces generated as a result of shear. The normal force generated during simple shear is a clear indication of the nonlinear nature of the material. The effect of fillers (hydrated lime and limestone), air voids, aggregate gradation, asphalt source and step loading on normal force generation during torsion is experimentally investigated. Based on experimental evidence, a non-linear thermomechanical model for sandasphalt mixtures based on the idea of multiple natural configurations is developed. The model accounts for the fact that the mixture has a natural configuration (stressfree configuration) which evolves as it is subjected to loads. Assumptions are made regarding the manner in which the material stores and dissipates energy. A key assumption is that among the various constitutive relations possible, the one that is chosen is the one that maximizes the rate of entropy production. The model that is developed accounts for the anisotropic nature of the response. The experimental results show that asphalt bound mixtures generate significant normal forces even at low rotation rates. The source of asphalt, aggregate gradation, fillers and air voids have a pronounced effect on normal stress generation. The model is corroborated against data from torsion experiments. Advisors/Committee Members: Rajagopal, Kumbakonam R. (advisor), Anand, N. K. (committee member), Little, Dallas N. (committee member), Masad, Eyad (committee member), Walton, Jay R. (committee member).

Subjects/Keywords: Sand-Asphalt Mixtures; Normal Forces; Constitutive Model

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APA (6^th Edition):

Ravindran, P. (2009). A study of sand-asphalt mixtures: a constitutive model based on a thermomechanical framework and experimental corroboration. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-1822

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ravindran, Parag. “A study of sand-asphalt mixtures: a constitutive model based on a thermomechanical framework and experimental corroboration.” 2009. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-1822.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ravindran, Parag. “A study of sand-asphalt mixtures: a constitutive model based on a thermomechanical framework and experimental corroboration.” 2009. Web. 14 Dec 2019.

Vancouver:

Ravindran P. A study of sand-asphalt mixtures: a constitutive model based on a thermomechanical framework and experimental corroboration. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1822.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ravindran P. A study of sand-asphalt mixtures: a constitutive model based on a thermomechanical framework and experimental corroboration. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1822

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

4. Gordillo Ariza, Gerardo. Fixed Bed Countercurrent Low Temperature Gasification of Dairy Biomass and Coal-Dairy Biomass Blends Using Air-Steam as Oxidizer.

Degree: 2010, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-870

► Concentrated animal feeding operations such as cattle feedlots and dairies produce a large amount of manure, cattle biomass (CB), which may lead to land, water,… (more)

▼ Concentrated animal feeding operations such as cattle feedlots and dairies produce a large amount of manure, cattle biomass (CB), which may lead to land, water, and air pollution if waste handling systems and storage and treatment structures are not properly managed. However, the concentrated production of low quality CB at these feeding operations serves as a good feedstock for in situ gasification for syngas (CO and H2) production and subsequent use in power generation. A small scale (10 kW) countercurrent fixed bed gasifier was rebuilt to perform gasification studies under quasisteady state conditions using dairy biomass (DB) as feedstock and various air-steam mixtures as oxidizing sources. A DB-ash (from DB) blend and a DB-Wyoming coal blend were also studied for comparison purposes. In addition, chlorinated char was also produced via pure pyrolysis of DB using N2 and N2-steam gas mixtures. The chlorinated char is useful for enhanced capture of Hg in ESP of coal fired boilers. Two main parameters were investigated in the gasification studies with air-steam mixtures. One was the equivalence ratio ER (the ratio of stochiometric air to actual air) and the second was the steam to fuel ratio (S:F). Prior to the experimental studies, atom conservation with i) limited product species and ii) equilibrium modeling studies with a large number of product species were performed on the gasification of DB to determine suitable range of operating conditions (ER and S:F ratio). Results on bed temperature profile, gas composition (CO, CO2, H2, CH4, C2H6, and N2), gross heating value (HHV), and energy conversion efficiency (ECE) are presented. Both modeling and experimental results show that gasification under increased ER and S:F ratios tend to produce rich mixtures in H2 and CO2 but poor in CO. Increased ER produces gases with higher HHV but decreases the ECE due to higher tar and char production. Gasification of DB under the operating conditions 1.59<ER less than6.36 and 0.35<s:f>less than0.8 yielded gas mixtures with compositions as given below: CO (4.77 - 11.73 %), H2 (13.48 - 25.45%), CO2 (11-25.2%), CH4 (0.43-1.73 %), and C2H6 (0.2- 0.69%). In general, the bed temperature profiles had peaks that ranged between 519 and 1032 degrees C for DB gasification. Advisors/Committee Members: Annamalai, Kalyan (advisor), Anand, N K. (committee member), Guo, Bing (committee member), Holtzapple, Mark T. (committee member).

Subjects/Keywords: Gasification; Dairy biomass, fixed Bed; Counter Current, Coal, air-Steam

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APA (6^th Edition):

Gordillo Ariza, G. (2010). Fixed Bed Countercurrent Low Temperature Gasification of Dairy Biomass and Coal-Dairy Biomass Blends Using Air-Steam as Oxidizer. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-870

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gordillo Ariza, Gerardo. “Fixed Bed Countercurrent Low Temperature Gasification of Dairy Biomass and Coal-Dairy Biomass Blends Using Air-Steam as Oxidizer.” 2010. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-870.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gordillo Ariza, Gerardo. “Fixed Bed Countercurrent Low Temperature Gasification of Dairy Biomass and Coal-Dairy Biomass Blends Using Air-Steam as Oxidizer.” 2010. Web. 14 Dec 2019.

Vancouver:

Gordillo Ariza G. Fixed Bed Countercurrent Low Temperature Gasification of Dairy Biomass and Coal-Dairy Biomass Blends Using Air-Steam as Oxidizer. [Internet] [Thesis]. Texas A&M University; 2010. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-870.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gordillo Ariza G. Fixed Bed Countercurrent Low Temperature Gasification of Dairy Biomass and Coal-Dairy Biomass Blends Using Air-Steam as Oxidizer. [Thesis]. Texas A&M University; 2010. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-870

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

5. Fullerton, Tracy. Numerical Study of Convective Heat Transfer in Flat Tube Heat Exchangers Operating in Self-Sustained Oscillatory Flow Regimes.

Degree: 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10545

► Laminar, two-dimensional, constant-property numerical simulations of flat tube heat exchanger devices operating in flow regimes in which self-sustained oscillations occur were performed. The unsteady flow… (more)

▼ Laminar, two-dimensional, constant-property numerical simulations of flat tube heat exchanger devices operating in flow regimes in which self-sustained oscillations occur were performed. The unsteady flow regimes were transition flow regimes characterized by cyclic variations of flow parameters such as stream-wise or cross-stream velocity. A computer code was developed to perform the numerical simulations. Spatial discretization was based upon a Control Volume Finite Element Method (CVFEM). Temporal discretization was based upon a semi-implicit Runge-Kutta method. Double Cyclic conditions were used to limit the numerical domains to one repeating geometric module. Nine geometric domains representing flat tube heat exchanger devices were tested over a range of Reynolds numbers. A maximum Reynolds number (Re) of 2000 was established to keep the study within the transition range. For each domain, a critical Reynolds number (Re_crit) was found such that for Re < Re_crit the flow was steady, laminar flow and for Re > Re_crit the flow exhibited cyclic oscillations. For the cases tested, the variation in longitudinal pitch had little impact on the Re_crit value for a fixed transverse pitch. However, for a fixed longitudinal pitch, the Re_crit was increased for decreasing transverse pitch. The results demonstrate the importance of using unsteady simulation methods for these cases. Nusselt numbers predicted by the unsteady method were on the order of 65% higher than predicted by steady methods for the same Reynolds numbers. Data for required pumping power versus resultant Nusselt number were collected which showed four distinct operating regions for these devices spanning the low Reynolds number, steady flow region through the self-sustained oscillating flow region. Based on the data, the recommended operating region is the region of self-sustained oscillations as this region is characterized by the highest increase in Nusselt number per increase in required pumping power. Advisors/Committee Members: Anand, N K. (advisor), O'Neal, Dennis (committee member), Morrison, Gerald (committee member), Chen, H C. (committee member).

Subjects/Keywords: flat tube; self-sustained oscillations; CVFEM

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Fullerton, T. (2012). Numerical Study of Convective Heat Transfer in Flat Tube Heat Exchangers Operating in Self-Sustained Oscillatory Flow Regimes. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10545

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Fullerton, Tracy. “Numerical Study of Convective Heat Transfer in Flat Tube Heat Exchangers Operating in Self-Sustained Oscillatory Flow Regimes.” 2012. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10545.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Fullerton, Tracy. “Numerical Study of Convective Heat Transfer in Flat Tube Heat Exchangers Operating in Self-Sustained Oscillatory Flow Regimes.” 2012. Web. 14 Dec 2019.

Vancouver:

Fullerton T. Numerical Study of Convective Heat Transfer in Flat Tube Heat Exchangers Operating in Self-Sustained Oscillatory Flow Regimes. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10545.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Fullerton T. Numerical Study of Convective Heat Transfer in Flat Tube Heat Exchangers Operating in Self-Sustained Oscillatory Flow Regimes. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10545

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

6. Park, Sang. The Effects of the Back Clearance Size and the Balance Holes on the Back Clearance Flow of the Centrifugal Pump with Semi-Open Impeller.

Degree: 2010, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-89

► Conventionally the size of the back clearance played a great importance on reducing the axial clearance by utilizing the concept that the decreased axial clearance… (more)

Subjects/Keywords: Centrifugal; Pump; Axial; Thrust; Clearance; Balance; Hole

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Park, S. (2010). The Effects of the Back Clearance Size and the Balance Holes on the Back Clearance Flow of the Centrifugal Pump with Semi-Open Impeller. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-89

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Park, Sang. “The Effects of the Back Clearance Size and the Balance Holes on the Back Clearance Flow of the Centrifugal Pump with Semi-Open Impeller.” 2010. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-89.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Park, Sang. “The Effects of the Back Clearance Size and the Balance Holes on the Back Clearance Flow of the Centrifugal Pump with Semi-Open Impeller.” 2010. Web. 14 Dec 2019.

Vancouver:

Park S. The Effects of the Back Clearance Size and the Balance Holes on the Back Clearance Flow of the Centrifugal Pump with Semi-Open Impeller. [Internet] [Thesis]. Texas A&M University; 2010. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-89.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Park S. The Effects of the Back Clearance Size and the Balance Holes on the Back Clearance Flow of the Centrifugal Pump with Semi-Open Impeller. [Thesis]. Texas A&M University; 2010. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-89

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

7. Roy, Pratanu. Numerical Study of Flow and Heat Transfer in Rotating Microchannels.

Degree: 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/153917

► Investigation of fluid flow and heat transfer in rotating microchannels is important for centrifugal microfluidics, which has emerged as an advanced technique in biomedical applications… (more)

▼ Investigation of fluid flow and heat transfer in rotating microchannels is important for centrifugal microfluidics, which has emerged as an advanced technique in biomedical applications and chemical separations. The centrifugal force and the Coriolis force, arising as a consequence of the microchannel rotation, change the flow pattern significantly from the symmetric profile of a non-rotating channel. A successful design of a centrifugal microfluidic device depends on effectively regulating these forces in rotating microchannels. Although a large number of experimental studies have been performed in order to demonstrate the applications of centrifugal microfluidics in various fields, a systematic study on the effect of rotation, channel aspect ratio, and wall boundary conditions on the fluid flow and heat transfer phenomena in rotating microchannels has not yet been conducted. During the present study, pressure-based finite volume solvers in both staggered and collocated grids were developed to solve steady and unsteady, incompressible Navier-Stokes equations. The serial solver in collocated grid was parallelized using a Message Passing Interface (MPI) library. In order to accelerate the convergence of the collocated finite volume solver, a non-linear multi-grid method was developed. The parallel performances of the single and multi-grid solvers were tested on a two-dimensional lid driven cavity flow. High fidelity benchmark solution to a lid driven cavity flow problem in a 1024 x 1024 grid was presented for a range of Reynolds numbers. Parallel multigrid speedup as high as three orders of magnitude was achieved for low Reynolds number flows. In addition, the optimal multigrid efficiency was validated. The fluid flow in a rotating microchannel was modeled as a steady, laminar in compressible flow with no slip and slip boundary conditions. For no slip boundary condition, critical values of parameters that determine the extent of the centrifugal force and the Coriolis force were identified. The critical aspect ratio (=width/height) that causes the optimal mixing of two liquids was found to be 1.0. For liquid slip boundary condition, the effect of rotation on liquid slip flow in rotating microchannels with hydrophobic and superhydrophobic surfaces was studied. New correlations for friction relation (fRe) as a function of slip length (?) and rotational Reynolds number (Re?) were proposed. It was also found that, the liquid slip can increase or decrease the heat transfer depending on the secondary flow effect and the aspect ratio of the microchannel. The microscale effects, such as surface tension and contact angle boundary condition, were included in the modeled problem. A level set method was applied to incorporate these microscale effects, which will enable us to investigate the unsteady nature of the liquid meniscus during two-phase flow simulations. Advisors/Committee Members: Anand, N. K. (advisor), Banerjee, D. (advisor), Han, J. C. (committee member), Chen, H. C. (committee member).

Subjects/Keywords: Rotating Microchannels; Finite Volume Method; Multigrid Algorithm; Parallel Algorithm; Collocated Grid; Slip Boundary Condition; Level Set Method

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APA (6^th Edition):

Roy, P. (2014). Numerical Study of Flow and Heat Transfer in Rotating Microchannels. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153917

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Roy, Pratanu. “Numerical Study of Flow and Heat Transfer in Rotating Microchannels.” 2014. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/153917.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Roy, Pratanu. “Numerical Study of Flow and Heat Transfer in Rotating Microchannels.” 2014. Web. 14 Dec 2019.

Vancouver:

Roy P. Numerical Study of Flow and Heat Transfer in Rotating Microchannels. [Internet] [Thesis]. Texas A&M University; 2014. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/153917.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Roy P. Numerical Study of Flow and Heat Transfer in Rotating Microchannels. [Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153917

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

8. Ellis, Michael Clay. The tangential velocity profile and momentum transfer within a microgravity, vortex separator.

Degree: 2009, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-1167

► Liquid and gas do not separate naturally in microgravity, presenting a problem for twophase space systems. Increased integration of multiphase systems requires a separation method… (more)

▼ Liquid and gas do not separate naturally in microgravity, presenting a problem for twophase space systems. Increased integration of multiphase systems requires a separation method adaptable to a variety of systems. Researchers at Texas A&M University (TAMU) have developed a microgravity vortex separator (MVS) capable of handling both a wide range of inlet conditions and changes in these conditions. To optimize the MVS design, the effects of nozzle area, separator geometry, and inlet flow rate must be understood. Computational fluid dynamics (CFD), in the form of Adapco?s Star-CD, is used, along with laboratory testing, to accomplish this goal. Furthermore, as analysis aids for the laboratory data and CFD results, relationships for radial pressure, bubble transit time, and momentum transfer were developed. Ground testing data showed a linear relationship between rotational speed and inlet flow rate. The CFD results compared well with the ground data and indicated that the majority of the rotational flow travels at nearly the same rotational speed. Examination of the tangential velocity profile also showed that a reduction of nozzle outlet area resulted in increased tangential velocities. Using dimensional analysis, a relationship between separator radius, inlet momentum rate, fluid properties, and rotational speed was found. Applying this relationship to the ground data and CFD results showed a strong correlation between the two dimensionless groups. Linear regression provided an equation linking rotational speed to the separator parameters. This equation was tested against the ground data and shown to predict average rotational speed well for all separator models. These results were used to calculate the radial and axial transit times of gas bubbles within the separation volume. Radial transit time was found to decrease more rapidly than axial transit time as gas volume increased, indicating axial and radial transit times are closest in value for the all liquid case and increasing gas core diameter improves the operational characteristics of the separator. From a design standpoint, the all liquid case provides a minimum flow rate for successful phase separation. Maximum flow rate depends on the pressure resources of the system. Advisors/Committee Members: Best, Frederick (advisor), Anand, N. K. (committee member), Hassan, Yassin (committee member).

Subjects/Keywords: Microgravity Phase Separation; Vortex Separator

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APA (6^th Edition):

Ellis, M. C. (2009). The tangential velocity profile and momentum transfer within a microgravity, vortex separator. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-1167

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ellis, Michael Clay. “The tangential velocity profile and momentum transfer within a microgravity, vortex separator.” 2009. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-1167.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ellis, Michael Clay. “The tangential velocity profile and momentum transfer within a microgravity, vortex separator.” 2009. Web. 14 Dec 2019.

Vancouver:

Ellis MC. The tangential velocity profile and momentum transfer within a microgravity, vortex separator. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1167.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ellis MC. The tangential velocity profile and momentum transfer within a microgravity, vortex separator. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1167

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

9. Aiyalur Shankaran, Rohit. Numerical simulation of flow of shear-thinning fluids in corrugated channels.

Degree: 2009, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2082

► A numerical study of flow of a shear thinning fluid through a pair of corrugated plates was carried out. The aim of the study was… (more)

Subjects/Keywords: Corrugated channels

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APA (6^th Edition):

Aiyalur Shankaran, R. (2009). Numerical simulation of flow of shear-thinning fluids in corrugated channels. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2082

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Aiyalur Shankaran, Rohit. “Numerical simulation of flow of shear-thinning fluids in corrugated channels.” 2009. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2082.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Aiyalur Shankaran, Rohit. “Numerical simulation of flow of shear-thinning fluids in corrugated channels.” 2009. Web. 14 Dec 2019.

Vancouver:

Aiyalur Shankaran R. Numerical simulation of flow of shear-thinning fluids in corrugated channels. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2082.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Aiyalur Shankaran R. Numerical simulation of flow of shear-thinning fluids in corrugated channels. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2082

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

10. Koneru, Saradhi. A thermodynamic approach for compaction of asphaltic composites.

Degree: 2009, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-1147

► This thesis studies the mechanics which can be associated with asphalt concrete compaction and develops continuum models in a general thermo-mechanical setting which can be… (more)

▼ This thesis studies the mechanics which can be associated with asphalt concrete compaction and develops continuum models in a general thermo-mechanical setting which can be used in future work to corroborate experimental compaction experiment results. Modeling asphalt concrete compaction, and also the ability to thereby predict response of mixes, is of great importance to the pavement industry. Asphalt concrete exhibits nonlinear response even at small strains and the response of asphalt concrete to different types of loading is quite different. The properties of asphalt concrete are highly influenced by the type and amount of the aggregates and the asphalt used. The internal structure of asphalt concrete continues to evolve during the loading process. This is due to the influence of different kinds of activities at the micro-structure level and to the interactions with the environment. The properties of asphalt concrete depend on its internal structure. Hence, we need to take into account the evolution of the internal structure in modeling the response of asphalt concrete. A theoretical model has been developed using the notion of multiple natural configurations to study a variety of non-linear dissipative responses of real materials. By specifying the forms for the stored energy and the rate of dissipation function of the material, a specific model was developed using this framework to model asphalt compaction. A compressible model is developed by choosing appropriate forms of stored energy and rate of dissipation function. Finally, a parametric study of the model is presented for a simple compression deformation. It is anticipated that the present work will aid in the development of better constitutive equations which in turn will accurately model asphalt compaction both in laboratory and in field. Distinct numerical approaches have been used to demonstrate the applicability of the theoretical framework to model material response of asphalt. Advisors/Committee Members: Masad, Eyad (advisor), Rajagopal, K. R. (advisor), Anand, N. K. (committee member).

Subjects/Keywords: thermodynamics; nonlinear; dissipation; helmholtz; compaction; asphalt concrete

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APA (6^th Edition):

Koneru, S. (2009). A thermodynamic approach for compaction of asphaltic composites. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-1147

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Koneru, Saradhi. “A thermodynamic approach for compaction of asphaltic composites.” 2009. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-1147.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Koneru, Saradhi. “A thermodynamic approach for compaction of asphaltic composites.” 2009. Web. 14 Dec 2019.

Vancouver:

Koneru S. A thermodynamic approach for compaction of asphaltic composites. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1147.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Koneru S. A thermodynamic approach for compaction of asphaltic composites. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1147

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

11. Rao, Pradeep C. Analysis of Topological Chaos in Ghost Rod Mixing at Finite Reynolds Numbers Using Spectral Methods.

Degree: 2011, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7609

► The effect of finite Reynolds numbers on chaotic advection is investigated for two dimensional lid-driven cavity flows that exhibit topological chaos in the creeping flow… (more)

Subjects/Keywords: mixing; chaotic advection; inertial effects; spectral methods

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APA (6^th Edition):

Rao, P. C. (2011). Analysis of Topological Chaos in Ghost Rod Mixing at Finite Reynolds Numbers Using Spectral Methods. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7609

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Rao, Pradeep C. “Analysis of Topological Chaos in Ghost Rod Mixing at Finite Reynolds Numbers Using Spectral Methods.” 2011. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7609.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Rao, Pradeep C. “Analysis of Topological Chaos in Ghost Rod Mixing at Finite Reynolds Numbers Using Spectral Methods.” 2011. Web. 14 Dec 2019.

Vancouver:

Rao PC. Analysis of Topological Chaos in Ghost Rod Mixing at Finite Reynolds Numbers Using Spectral Methods. [Internet] [Thesis]. Texas A&M University; 2011. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7609.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Rao PC. Analysis of Topological Chaos in Ghost Rod Mixing at Finite Reynolds Numbers Using Spectral Methods. [Thesis]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7609

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

12. Achanta, Vamsee Satish. An experimental study of endwall heat transfer enhancement for flow past staggered non-conducting pin fin arrays.

Degree: 2004, Texas A&M University

URL: http://hdl.handle.net/1969.1/140

► In this work, we study the enhanced endwall heat transfer for flow past non conducting pin fin arrays. The aim is to resolve the controversy… (more)

Subjects/Keywords: Endwall Heat Transfer for Pin Fin Arrays

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APA (6^th Edition):

Achanta, V. S. (2004). An experimental study of endwall heat transfer enhancement for flow past staggered non-conducting pin fin arrays. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/140

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Achanta, Vamsee Satish. “An experimental study of endwall heat transfer enhancement for flow past staggered non-conducting pin fin arrays.” 2004. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/140.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Achanta, Vamsee Satish. “An experimental study of endwall heat transfer enhancement for flow past staggered non-conducting pin fin arrays.” 2004. Web. 14 Dec 2019.

Vancouver:

Achanta VS. An experimental study of endwall heat transfer enhancement for flow past staggered non-conducting pin fin arrays. [Internet] [Thesis]. Texas A&M University; 2004. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/140.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Achanta VS. An experimental study of endwall heat transfer enhancement for flow past staggered non-conducting pin fin arrays. [Thesis]. Texas A&M University; 2004. Available from: http://hdl.handle.net/1969.1/140

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

13. Lee, Kurn Chul. Heat release effects on decaying homogeneous compressible turbulence.

Degree: 2009, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2622

► High Mach-number compressible flows with heat release are inherently more complicated than incompressible flows due to, among other reasons, the activation of the thermal energy… (more)

▼ High Mach-number compressible flows with heat release are inherently more complicated than incompressible flows due to, among other reasons, the activation of the thermal energy mode. Such flow fields can experience significant fluctuations in density, temperature, viscosity, conductivity and specific heat, which affect velocity and pressure fluctuations. Furthermore, the flow field cannot be assumed to be dilatation-free in high Mach numbers and even in low Mach-number flows involving combustion, or in boundary layers on heated walls. The main issue in these high-speed and highly-compressible flows is the effect of thermal gradients and fluctuations on turbulence. The thermal field has various routes through which it affects flow structures of compressible turbulence. First, it has direct influence through pressure, which affects turbulence via pressure-strain correlation. The indirect effects of thermal fields on compressible turbulence are through the changes in flow properties. The high temperature gradients alter the transport coefficient and compressibility of the flow. The objective of this work is to answer the following questions: How do temperature fluctuations change the compressible flow structure and energetics? How does compressibility in the flow affect the non-linear pressure redistribution process? What is the main effect of spatial transport-coefficient variation? We perform direct numerical simulations (DNS) to answer the above questions. The investigations are categorized into four parts: 1) Turbulent energy cascade and kinetic-internal energy interactions under the influence of temperature fluctuations; 2) Return-to-isotropy of anisotropic turbulence under the influence of large temperature fluctuations; 3) The effect of turbulent Mach number and dilatation level on small-scale (velocity-gradient) dynamics; 4) The effect of variable transport-coefficients (viscosity and diffusivity) on cascade and dissipation processes of turbulence. The findings lead to a better understanding of temperature fluctuation effects on non-linear processes in compressible turbulence. This improved understanding is expected to provide direction for improving second-order closure models of compressible turbulence. Advisors/Committee Members: Girimaji, Sharath S. (advisor), Anand, N. K. (committee member), Bowersox, Rodney (committee member), Daripa, Prabir (committee member).

Subjects/Keywords: compressible turbulence; heat release effect; energy redistribution; direct numerical simulations

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APA (6^th Edition):

Lee, K. C. (2009). Heat release effects on decaying homogeneous compressible turbulence. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2622

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lee, Kurn Chul. “Heat release effects on decaying homogeneous compressible turbulence.” 2009. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2622.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lee, Kurn Chul. “Heat release effects on decaying homogeneous compressible turbulence.” 2009. Web. 14 Dec 2019.

Vancouver:

Lee KC. Heat release effects on decaying homogeneous compressible turbulence. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2622.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lee KC. Heat release effects on decaying homogeneous compressible turbulence. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2622

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

14. Ijaz, Muhammad. Implicit Runge-Kutta Methods to Simulate Unsteady Incompressible Flows.

Degree: 2009, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2086

► A numerical method (SIMPLE DIRK Method) for unsteady incompressible viscous flow simulation is presented. The proposed method can be used to achieve arbitrarily high order… (more)

Subjects/Keywords: incompressible flow; higher order; unsteady flow; transient flow; implicit runge-kutta; non-staggered; co-located; finite volume; SIMPLE DIRK; temporal discretization; accurate

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APA (6^th Edition):

Ijaz, M. (2009). Implicit Runge-Kutta Methods to Simulate Unsteady Incompressible Flows. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2086

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ijaz, Muhammad. “Implicit Runge-Kutta Methods to Simulate Unsteady Incompressible Flows.” 2009. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2086.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ijaz, Muhammad. “Implicit Runge-Kutta Methods to Simulate Unsteady Incompressible Flows.” 2009. Web. 14 Dec 2019.

Vancouver:

Ijaz M. Implicit Runge-Kutta Methods to Simulate Unsteady Incompressible Flows. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2086.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ijaz M. Implicit Runge-Kutta Methods to Simulate Unsteady Incompressible Flows. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2086

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

15. Lee, Sang Won. Heat transfer characteristics of a two-pass trapezoidal channel and a novel heat pipe.

Degree: 2009, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-1940

► The heat transfer characteristics of airflows in serpentine cooling channels in stator vanes of gas turbines and the novel QuTech? Heat Pipe (QTHP) for electronic… (more)

▼ The heat transfer characteristics of airflows in serpentine cooling channels in stator vanes of gas turbines and the novel QuTech? Heat Pipe (QTHP) for electronic cooling applications were studied. The cooling channels are modeled as smooth and roughened two-pass trapezoidal channels with a 180? turn over a range of Reynolds numbers between about 10,000 and 60,000. The naphthalene sublimation technique and the heat and mass transfer analogy were applied. The results showed that there was a very large variation of the local heat (mass) transfer distribution in the turn and downstream of the turn. The local heat (mass) transfer was high near the end wall and the downstream outer wall in the turn and was relatively low in two regions near the upstream outer wall and the downstream edge at the tip of the divider wall in the turn. The variation of the local heat (mass) transfer was larger with ribs on two opposite walls than with smooth walls. The regional average heat (mass) transfer was lower in the turn and higher in the entire channel with the flow entering the channel through the larger straight section than when the flow was reversed. The pressure drop across the turn was higher with the flow entering the channel through the larger channel than when the flow was reversed. Thermal performance of the QuTech? Heat Pipe was identified over a range of inclination angles between 90? and -90? and thermal mechanism of the QTHP was studied with GC-MS, ICP-OES, XRD, XPS, and DSC. This study resulted in the following findings: the performance of the QTHP was severely dependent on gravity; the QTHP utilizes water as working fluid; there were inorganic components such as Na, K, P, S, and Cr, etc.; and the vaporization temperature of the working fluid (mostly water) was lower than the boiling temperature of pure water. This was due to the presence of inorganic salt hydrates in the QTHP. It may be concluded that thermal performance of heat pipes increases with additional latent heat of fusion energy and energy required to release water molecules from salt hydrates. Advisors/Committee Members: Lau, Sai C. (advisor), Marotta, Ed (advisor), Anand, N. K. (committee member), Han, Je C. (committee member), Hassan, Yassin A. (committee member).

Subjects/Keywords: force convective heat trasnfer; two phase heat trasnfer; gas turbine airfoil; heat pipe

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APA (6^th Edition):

Lee, S. W. (2009). Heat transfer characteristics of a two-pass trapezoidal channel and a novel heat pipe. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-1940

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lee, Sang Won. “Heat transfer characteristics of a two-pass trapezoidal channel and a novel heat pipe.” 2009. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-1940.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lee, Sang Won. “Heat transfer characteristics of a two-pass trapezoidal channel and a novel heat pipe.” 2009. Web. 14 Dec 2019.

Vancouver:

Lee SW. Heat transfer characteristics of a two-pass trapezoidal channel and a novel heat pipe. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1940.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lee SW. Heat transfer characteristics of a two-pass trapezoidal channel and a novel heat pipe. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1940

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

16. Barbosa Saldana, Juan Gabriel. Numerical simualtion of mixed convection over a three-dimensional horizontal backward-facing step.

Degree: 2005, Texas A&M University

URL: http://hdl.handle.net/1969.1/2353

► A FORTRAN code was developed to numerically simulate the mixed convective flow over a three-dimensional horizontal backward-facing step. The momentum and energy equations under the… (more)

▼ A FORTRAN code was developed to numerically simulate the mixed convective flow over a three-dimensional horizontal backward-facing step. The momentum and energy equations under the assumption of the Boussinesq approximation were discretized by means of a finite volume technique. The SIMPLE algorithm scheme was applied to link the pressure and velocity fields inside the domain while an OpenMP parallel implementation was proposed to improve the numerical performance and to accelerate the numerical solution. The heating process corresponds to a channel heated from below at constant temperature keeping insulated all the other channel walls. In addition, the back-step was considered as a thermally conducting block and its influence in the heating process was explored by holding different solid to fluid thermal conductivity ratios. The effects over the velocity and temperature distribution of buoyancy forces, acting perpendicular to the mainstream flow, are studied for three different Richardson numbers Ri=3, 2, and 1 and the results are compared against those of pure forced convection Ri=0. In these simulations the Reynolds number is fixed at 200 while the bottom wall temperature is adjusted to fulfill the conditions for the different Ri. Under this assumption, as Ri increases the buoyancy effects are the dominant effects in the mixed convective process. The numerical results indicate that the velocity field and the temperature distribution for pure forced convection are highly distorted if compared with the mixed convective flow. If the Ri parameter is increased, then the primary re-circulation zone is reduced. Similarly, as the buoyancy forces become predominant in the flow, the convective rolls, in the form of spiral-flow structures, become curlier and then higher velocity components are found inside the domain. The temperature field distribution showed that as the Ri is increased a thicker layer of high temperature flow is located at the channel??s top wall as a result of the higher rates of low-density flow moving to the top wall. The flow is ascending by the channel sidewalls, while descending by the channel span-wise central plane. The parallel numerical strategy is presented and some results for the performance of the OpenMP implementation are included. In this sense, linear speedup was obtained when using 16 possessors in parallel. Advisors/Committee Members: Anand, N. K. (advisor), Sarin, Vivek (advisor), Lau, Sai (committee member), Taylor, Valerie (committee member).

Subjects/Keywords: Numerical simulation; Mixed Convection; Backward-Facing Step

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APA (6^th Edition):

Barbosa Saldana, J. G. (2005). Numerical simualtion of mixed convection over a three-dimensional horizontal backward-facing step. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/2353

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Barbosa Saldana, Juan Gabriel. “Numerical simualtion of mixed convection over a three-dimensional horizontal backward-facing step.” 2005. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/2353.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Barbosa Saldana, Juan Gabriel. “Numerical simualtion of mixed convection over a three-dimensional horizontal backward-facing step.” 2005. Web. 14 Dec 2019.

Vancouver:

Barbosa Saldana JG. Numerical simualtion of mixed convection over a three-dimensional horizontal backward-facing step. [Internet] [Thesis]. Texas A&M University; 2005. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/2353.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Barbosa Saldana JG. Numerical simualtion of mixed convection over a three-dimensional horizontal backward-facing step. [Thesis]. Texas A&M University; 2005. Available from: http://hdl.handle.net/1969.1/2353

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

17. Hahm, Jungyoon. Numerical simulation of electrokinetically driven micro flows.

Degree: 2005, Texas A&M University

URL: http://hdl.handle.net/1969.1/2594

► Spectral element based numerical solvers are developed to simulate electrokinetically driven flows for micro-fluidic applications. Based on these numerical solvers, basic phenomena and devices for… (more)

Subjects/Keywords: micro-fluidics; electrokinetic; spectral element method; flow and species control; mobility measurement

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APA (6^th Edition):

Hahm, J. (2005). Numerical simulation of electrokinetically driven micro flows. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/2594

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hahm, Jungyoon. “Numerical simulation of electrokinetically driven micro flows.” 2005. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/2594.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hahm, Jungyoon. “Numerical simulation of electrokinetically driven micro flows.” 2005. Web. 14 Dec 2019.

Vancouver:

Hahm J. Numerical simulation of electrokinetically driven micro flows. [Internet] [Thesis]. Texas A&M University; 2005. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/2594.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hahm J. Numerical simulation of electrokinetically driven micro flows. [Thesis]. Texas A&M University; 2005. Available from: http://hdl.handle.net/1969.1/2594

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

18. Subramanian, Karthik. Turbulent heat transfer in a trapezoidal channel with transverse and v-shaped ribs on two opposite walls.

Degree: 2006, Texas A&M University

URL: http://hdl.handle.net/1969.1/3175

► This study investigates the turbulent heat transfer and friction in a trapezoidal channel with opposite walls roughened with transverse and v-shaped ribs. The roughened channel… (more)

Subjects/Keywords: Turbulent Heat Transfer; Trapezoidal Channel

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APA (6^th Edition):

Subramanian, K. (2006). Turbulent heat transfer in a trapezoidal channel with transverse and v-shaped ribs on two opposite walls. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/3175

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Subramanian, Karthik. “Turbulent heat transfer in a trapezoidal channel with transverse and v-shaped ribs on two opposite walls.” 2006. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/3175.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Subramanian, Karthik. “Turbulent heat transfer in a trapezoidal channel with transverse and v-shaped ribs on two opposite walls.” 2006. Web. 14 Dec 2019.

Vancouver:

Subramanian K. Turbulent heat transfer in a trapezoidal channel with transverse and v-shaped ribs on two opposite walls. [Internet] [Thesis]. Texas A&M University; 2006. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/3175.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Subramanian K. Turbulent heat transfer in a trapezoidal channel with transverse and v-shaped ribs on two opposite walls. [Thesis]. Texas A&M University; 2006. Available from: http://hdl.handle.net/1969.1/3175

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

19. Ganatra, Nirmal Kirtikumar. Validation of computer-generated results with experimental data obtained for torsional vibration of synchronous motor-driven turbomachinery.

Degree: 2004, Texas A&M University

URL: http://hdl.handle.net/1969.1/499

► Torsional vibration is an oscillatory angular twisting motion in the rotating members of a system. It can be deemed quite dangerous in that it cannot… (more)

Subjects/Keywords: torsional vibration; synchronous motors; torsional analysis; fatigue failure; vibration analysis; vibration; rotordynamics; turbomachinery

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APA (6^th Edition):

Ganatra, N. K. (2004). Validation of computer-generated results with experimental data obtained for torsional vibration of synchronous motor-driven turbomachinery. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/499

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ganatra, Nirmal Kirtikumar. “Validation of computer-generated results with experimental data obtained for torsional vibration of synchronous motor-driven turbomachinery.” 2004. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/499.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ganatra, Nirmal Kirtikumar. “Validation of computer-generated results with experimental data obtained for torsional vibration of synchronous motor-driven turbomachinery.” 2004. Web. 14 Dec 2019.

Vancouver:

Ganatra NK. Validation of computer-generated results with experimental data obtained for torsional vibration of synchronous motor-driven turbomachinery. [Internet] [Thesis]. Texas A&M University; 2004. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/499.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ganatra NK. Validation of computer-generated results with experimental data obtained for torsional vibration of synchronous motor-driven turbomachinery. [Thesis]. Texas A&M University; 2004. Available from: http://hdl.handle.net/1969.1/499

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

20. Gupta, Saurabh. Selective Catalytic Reduction (SCR) of nitric oxide with ammonia using Cu-ZSM-5 and Va-based honeycomb monolith catalysts: effect of H2 pretreatment, NH3-to-NO ratio, O2, and space velocity.

Degree: 2004, Texas A&M University

URL: http://hdl.handle.net/1969.1/526

► In this work, the steady-state performance of zeolite-based (Cu-ZSM-5) and vanadium-based honeycomb monolith catalysts was investigated in the selective catalytic reduction process (SCR) for NO… (more)

Subjects/Keywords: Cu-ZSM-5; vanadium; selective catalytic reduction; nitric oxide; ammonia; honeycomb monolith; pretreatment

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APA (6^th Edition):

Gupta, S. (2004). Selective Catalytic Reduction (SCR) of nitric oxide with ammonia using Cu-ZSM-5 and Va-based honeycomb monolith catalysts: effect of H2 pretreatment, NH3-to-NO ratio, O2, and space velocity. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/526

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gupta, Saurabh. “Selective Catalytic Reduction (SCR) of nitric oxide with ammonia using Cu-ZSM-5 and Va-based honeycomb monolith catalysts: effect of H2 pretreatment, NH3-to-NO ratio, O2, and space velocity.” 2004. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/526.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gupta, Saurabh. “Selective Catalytic Reduction (SCR) of nitric oxide with ammonia using Cu-ZSM-5 and Va-based honeycomb monolith catalysts: effect of H2 pretreatment, NH3-to-NO ratio, O2, and space velocity.” 2004. Web. 14 Dec 2019.

Vancouver:

Gupta S. Selective Catalytic Reduction (SCR) of nitric oxide with ammonia using Cu-ZSM-5 and Va-based honeycomb monolith catalysts: effect of H2 pretreatment, NH3-to-NO ratio, O2, and space velocity. [Internet] [Thesis]. Texas A&M University; 2004. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/526.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gupta S. Selective Catalytic Reduction (SCR) of nitric oxide with ammonia using Cu-ZSM-5 and Va-based honeycomb monolith catalysts: effect of H2 pretreatment, NH3-to-NO ratio, O2, and space velocity. [Thesis]. Texas A&M University; 2004. Available from: http://hdl.handle.net/1969.1/526

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

21. Kasula, Lavan Kumar Reddy. Study of properties of sand asphalt using a torsional rheometer.

Degree: 2004, Texas A&M University

URL: http://hdl.handle.net/1969.1/1199

► The modeling of Sand Asphalt and experiments to measure their rheological properties are of vital concern to many industrial processes especially highway and roadway pavement… (more)

▼ The modeling of Sand Asphalt and experiments to measure their rheological properties are of vital concern to many industrial processes especially highway and roadway pavement construction industry. A variety of hot mix asphalt mixtures are used in highway and runway pavement construction, with each mixture catering to a specific need. These mixtures vary in type and percentage of aggregates and asphalt used and consequently exhibit marked differences in their response. The main thrust of this research is to provide experimental data which would be helpful in determining the efficacy of the constitutive models that have been developed for these hot mix asphalt mixtures. Here we attempt to provide experimental data in the raw form for Sand Asphalt mixtures that would be helpful in the theoretical modeling efforts involving asphalt materials using a continuum point of view. For example the data obtained can be of immense help to evaluate the constitutive model developed by Murali Krishnan and Rajagopal. The Sand Asphalt mixture in their model is modeled as `homogenized' single constituent due to the peculiarity of its makeup. The constitutive model of Murali Krishnan and Rajagopal is based on a thermodynamical framework for materials possessing multiple natural configurations (multiple stress free states) to derive the constitutive equations. Recently an Orthogonal Rheometer was built to characterize the granular solids by Gupta and Rajagopal which was later used by Baek in the torsional mode. In this work we have used the same Torsional Rheometer with some minor modifications in the design to measure some general properties of Sand Asphalt mixtures. Sand Asphalt mixtures, due to their non-linear viscoelastic character, exhibit `normal stress effects' and `stress relaxation'. The Rheometer that we used was able to capture these responses with high precision. We have laid out proper procedures for the further testing of asphalt related mixtures. A typical sand asphalt mixture sample in cylindrical shape was used as the test specimen. From this work some interesting data was obtained. A remarkable observation was that as the shear rate is increased, the normal force and torque generated initially decrease, but beyond a certain shear rate they attain a constant value. Advisors/Committee Members: Rajagopal, K. R. (advisor), Walton, Jay (committee member), Anand, N. K. (committee member).

Subjects/Keywords: Torsional Rheometer; Torsional flow; Rheometer; sand asphalt mixture; Orthogonal Rheometer

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APA (6^th Edition):

Kasula, L. K. R. (2004). Study of properties of sand asphalt using a torsional rheometer. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/1199

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kasula, Lavan Kumar Reddy. “Study of properties of sand asphalt using a torsional rheometer.” 2004. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/1199.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kasula, Lavan Kumar Reddy. “Study of properties of sand asphalt using a torsional rheometer.” 2004. Web. 14 Dec 2019.

Vancouver:

Kasula LKR. Study of properties of sand asphalt using a torsional rheometer. [Internet] [Thesis]. Texas A&M University; 2004. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/1199.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kasula LKR. Study of properties of sand asphalt using a torsional rheometer. [Thesis]. Texas A&M University; 2004. Available from: http://hdl.handle.net/1969.1/1199

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

22. Gupta, Radhika. Support graph preconditioners for sparse linear systems.

Degree: 2005, Texas A&M University

URL: http://hdl.handle.net/1969.1/1353

► Elliptic partial differential equations that are used to model physical phenomena give rise to large sparse linear systems. Such systems can be symmetric positive de?nite… (more)

Subjects/Keywords: preconditioning; conjugate gradients method; support theory; finite element method

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gupta, R. (2005). Support graph preconditioners for sparse linear systems. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/1353

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gupta, Radhika. “Support graph preconditioners for sparse linear systems.” 2005. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/1353.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gupta, Radhika. “Support graph preconditioners for sparse linear systems.” 2005. Web. 14 Dec 2019.

Vancouver:

Gupta R. Support graph preconditioners for sparse linear systems. [Internet] [Thesis]. Texas A&M University; 2005. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/1353.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gupta R. Support graph preconditioners for sparse linear systems. [Thesis]. Texas A&M University; 2005. Available from: http://hdl.handle.net/1969.1/1353

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

23. Fu, Wen-Lung. Aspect ratio effect on heat transfer in rotating two-pass rectangular channels with smooth walls and ribbed walls.

Degree: 2005, Texas A&M University

URL: http://hdl.handle.net/1969.1/2358

► This study experimentally investigates the effects of rotation, the buoyancy force, and the channel aspect ratio on heat transfer in two-pass rotating rectangular channels. The… (more)

▼ This study experimentally investigates the effects of rotation, the buoyancy force, and the channel aspect ratio on heat transfer in two-pass rotating rectangular channels. The experiments are conducted with two surface conditions: smooth walls and 45?? angled ribbed walls. The channel aspect ratios include 4:1, 2:1, 1:1, 1:2 and 1:4. Four Reynolds numbers are studied: 5000, 10000, 25000 and 40000. The rotation speed is fixed at 550 rpm for all tests, and for each channel, two channel orientations are studied: 90?? and 45?? or 135??, with respect to the plane of rotation. Rib turbulators are placed on the leading and trailing walls of the channels at an angle of 45?? to the flow direction. The ribs have a 1.59 by 1.59 mm square cross section, and the rib pitch-to-height ratio (P/e) is 10 for all tests. The effects of the local buoyancy parameter and channel aspect ratio on the regional Nusselt number ratio are presented. Pressure drop data are also measured for both smooth and ribbed channels in rotating and non-rotating conditions. The results show that increasing the local buoyancy parameter increases the Nusselt number ratio on the trailing surface and decreases the Nusselt number ratio on the leading surface in the first pass for all channels. However, the trend of the Nusselt number ratio in the second pass is more complicated due to the strong effect of the 180?? turn. Results are also presented for this critical turn region of the two-pass channels. In addition to these regions, the channel averaged heat transfer, friction factor, and thermal performance are determined for each channel. With the channels having comparable Nusselt number ratios, the 1:4 channel has the superior thermal performance because it incurs the least pressure penalty. In this study, the author is able to systematically analyze, correlate, and conclude the thermal performance comparison with the combination of rotation effects on five different aspect ratio channels with both smooth walls and rib turbulated walls. Advisors/Committee Members: Han, Je-Chin (advisor), Anand, N. K. (committee member), Chen, Hamn-Ching (committee member), Lai, Sai (committee member).

Subjects/Keywords: TURBINE; HEAT TRANSFER; ROTATING

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APA (6^th Edition):

Fu, W. (2005). Aspect ratio effect on heat transfer in rotating two-pass rectangular channels with smooth walls and ribbed walls. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/2358

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Fu, Wen-Lung. “Aspect ratio effect on heat transfer in rotating two-pass rectangular channels with smooth walls and ribbed walls.” 2005. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/2358.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Fu, Wen-Lung. “Aspect ratio effect on heat transfer in rotating two-pass rectangular channels with smooth walls and ribbed walls.” 2005. Web. 14 Dec 2019.

Vancouver:

Fu W. Aspect ratio effect on heat transfer in rotating two-pass rectangular channels with smooth walls and ribbed walls. [Internet] [Thesis]. Texas A&M University; 2005. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/2358.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Fu W. Aspect ratio effect on heat transfer in rotating two-pass rectangular channels with smooth walls and ribbed walls. [Thesis]. Texas A&M University; 2005. Available from: http://hdl.handle.net/1969.1/2358

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

24. Su, Guoguang. Numerical simulation of flow and heat transfer of internal cooling passage in gas turbine blade.

Degree: 2007, Texas A&M University

URL: http://hdl.handle.net/1969.1/4957

► A computational study of three-dimensional turbulent flow and heat transfer was performed in four types of rotating channels. The first type is a rotating rectangular… (more)

▼ A computational study of three-dimensional turbulent flow and heat transfer was performed in four types of rotating channels. The first type is a rotating rectangular channel with V-shaped ribs. The channel aspect ratio (AR) is 4:1, the rib height-to-hydraulic diameter ratio (e/Dh) is 0.078 and the rib pitch-to-height ratio (P/e) is 10. The rotation number and inlet coolant-to-wall density ratio were varied from 0.0 to 0.28 and from 0.122 to 0.40, respectively, while the Reynolds number was varied from 10,000 to 500,000. Three channel orientations (90 degrees, -135 degrees, and 135 degrees from the rotation direction) were also investigated. The second type is a rotating rectangular channel with staggered arrays of pinfins. The channel aspect ratio (AR) is 4:1, the pin length-to-diameter ratio is 2.0, and the pin spacing-to-diameter ratio is 2.0 in both the stream-wise and span-wise directions. The rotation number and inlet coolant-to-wall density ratio varied from 0.0 to 0.28 and from 0.122 to 0.20, respectively, while the Reynolds number varied from 10,000 to 100,000. For the rotating cases, the rectangular channel was oriented at 150 degrees with respect to the plane of rotation. In the rotating two-pass rectangular channel with 45-degree rib turbulators, three channels with different aspect ratios (AR=1:1; AR=1:2; AR=1:4) were investigated. Detailed predictions of mean velocity, mean temperature, and Nusselt number for two Reynolds numbers (Re=10,000 and Re=100,000) were carried out. The rib height is fixed as constant and the rib-pitch-to-height ratio (P/e) is 10, but the rib height-to-hydraulic diameter ratios (e/Dh) are 0.125, 0.094, and 0.078, for AR=1:1, AR=1:2, and AR=1:4 channels, respectively. The channel orientations are set as 90 degrees, the rotation number and inlet coolant-to-wall density ratio varied from 0.0 to 0.28 and from 0.13 to 0.40, respectively. The last type is the rotating two-pass smooth channel with three aspect ratios (AR=1:1; AR=1:2; AR=1:4). Detailed predictions of mean velocity, mean temperature and Nusselt number for two Reynolds numbers (Re=10,000 and Re=100,000) were carried out. The rotation number and inlet coolant-to-wall density ratio varied from 0.0 to 0.28 and from 0.13 to 0.40, respectively. A multi-block Reynolds-averaged Navier-Stokes (RANS) method was employed in conjunction with a near-wall second-moment turbulence closure. Advisors/Committee Members: Chen, Hamn-Ching (advisor), Han, Je-Chin (advisor), Anand, N. K (committee member), Lau, Sai (committee member).

Subjects/Keywords: Numerical; Heat Transfer; Cooling; Gas Turbine

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APA (6^th Edition):

Su, G. (2007). Numerical simulation of flow and heat transfer of internal cooling passage in gas turbine blade. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/4957

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Su, Guoguang. “Numerical simulation of flow and heat transfer of internal cooling passage in gas turbine blade.” 2007. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/4957.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Su, Guoguang. “Numerical simulation of flow and heat transfer of internal cooling passage in gas turbine blade.” 2007. Web. 14 Dec 2019.

Vancouver:

Su G. Numerical simulation of flow and heat transfer of internal cooling passage in gas turbine blade. [Internet] [Thesis]. Texas A&M University; 2007. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/4957.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Su G. Numerical simulation of flow and heat transfer of internal cooling passage in gas turbine blade. [Thesis]. Texas A&M University; 2007. Available from: http://hdl.handle.net/1969.1/4957

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

25. Ayers, George Harold. Cylindrical thermal contact conductance.

Degree: 2004, Texas A&M University

URL: http://hdl.handle.net/1969.1/88

► Thermal contact conductance is highly important in a wide variety of applications, from the cooling of electronic chips to the thermal management of spacecraft. The… (more)

Subjects/Keywords: conact conductance; heat transfer; cylindrical

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APA (6^th Edition):

Ayers, G. H. (2004). Cylindrical thermal contact conductance. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/88

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ayers, George Harold. “Cylindrical thermal contact conductance.” 2004. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/88.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ayers, George Harold. “Cylindrical thermal contact conductance.” 2004. Web. 14 Dec 2019.

Vancouver:

Ayers GH. Cylindrical thermal contact conductance. [Internet] [Thesis]. Texas A&M University; 2004. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/88.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ayers GH. Cylindrical thermal contact conductance. [Thesis]. Texas A&M University; 2004. Available from: http://hdl.handle.net/1969.1/88

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

26. Sert, Cuneyt. Nonconforming formulations with spectral element methods.

Degree: 2004, Texas A&M University

URL: http://hdl.handle.net/1969.1/1268

► A spectral element algorithm for solution of the incompressible Navier-Stokes and heat transfer equations is developed, with an emphasis on extending the classical conforming Galerkin… (more)

Subjects/Keywords: Nonconforming grids; Unstructured grids; Spectral Element Method; SEM; Mortar Element Method; Constrained Approximation Method; hp-refinement

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APA (6^th Edition):

Sert, C. (2004). Nonconforming formulations with spectral element methods. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/1268

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sert, Cuneyt. “Nonconforming formulations with spectral element methods.” 2004. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/1268.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sert, Cuneyt. “Nonconforming formulations with spectral element methods.” 2004. Web. 14 Dec 2019.

Vancouver:

Sert C. Nonconforming formulations with spectral element methods. [Internet] [Thesis]. Texas A&M University; 2004. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/1268.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sert C. Nonconforming formulations with spectral element methods. [Thesis]. Texas A&M University; 2004. Available from: http://hdl.handle.net/1969.1/1268

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

27. Ko, Kang-Hoon. Heat transfer enhancement in a channel with porous baffles.

Degree: 2005, Texas A&M University

URL: http://hdl.handle.net/1969.1/1519

► An experimental and numerical investigation of heat transfer enhancement in a three dimensional channel using wall mounted porous baffles was conducted. The module average heat… (more)

▼ An experimental and numerical investigation of heat transfer enhancement in a three dimensional channel using wall mounted porous baffles was conducted. The module average heat transfer coefficients were measured in a uniformly heated rectangular channel with staggered positioned porous baffles. A numerical procedure was implemented, in conjunction with a commercially available Navier-Stokes solver, to model the turbulent flow in porous media. The Brinkman-Forchheimer-Extended Darcy model was used for modeling fluid flow through the porous baffles. Conventional, oneequation, and two-equation models were used for heat transfer modeling. The accuracy and characteristics of each model were investigated and discussed. The results were compared with experimental data. Baffles were mounted alternatively on the top and bottom walls. Heat transfer coefficients and pressure loss for periodically fully developed flow and heat transfer were obtained for different pore densities (10, 20, and 40 pores per inch (PPI)) with two different baffle heights ( / h h B D = 1/3 and 2/3), and two baffle thicknesses ( / t h B D = 1/3 and 1/12). The Reynolds number (Re) was varied from 20,000 to 50,000. To compare the effect of foam metal baffles, the data for conventional solid-type baffles was obtained for ( / t h B D =1/3). The maximum uncertainties associated with the module Nusselt number and friction factor were 5.8% and 4.3%, respectively. The experimental procedure was validated by comparing the data for the straight channel without baffles ( / h h B D = 0) with those in the literature. The use of porous baffles resulted in heat transfer enhancement as high as 300% compared to heat transfer in straight channels without baffles. However, the heat transfer enhancement per unit increase in pumping power was less than one for the range of parameters studied in this work. Correlation equations were developed for the heat transfer enhancement ratio and the heat transfer enhancement per unit increase in pumping power in terms of Reynolds number. The conventional theoretical model, the dispersion conductivity model, and the modified two-phase model using the local thermal non-equilibrium theory were considered. The results from each model were compared against the experimental data, and compared to each other to investigate the efficiency of each model. Also, the characteristics of each model were discussed. Advisors/Committee Members: Anand, N. K. (advisor), Beskok, Ali (committee member), Chen, H. C. (committee member), Lau, S. C. (committee member).

Subjects/Keywords: Porous; Effective Conductivity; Foam Material; Turbulent Flow; Two-Equation Model

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ko, K. (2005). Heat transfer enhancement in a channel with porous baffles. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/1519

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ko, Kang-Hoon. “Heat transfer enhancement in a channel with porous baffles.” 2005. Thesis, Texas A&M University. Accessed December 14, 2019. http://hdl.handle.net/1969.1/1519.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ko, Kang-Hoon. “Heat transfer enhancement in a channel with porous baffles.” 2005. Web. 14 Dec 2019.

Vancouver:

Ko K. Heat transfer enhancement in a channel with porous baffles. [Internet] [Thesis]. Texas A&M University; 2005. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/1969.1/1519.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ko K. Heat transfer enhancement in a channel with porous baffles. [Thesis]. Texas A&M University; 2005. Available from: http://hdl.handle.net/1969.1/1519

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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